CVE-2026-53796

rsync before 3.5.0 contains a time-of-check to time-of-use (TOCTOU) race condition vulnerability in the non-daemon receiver's destination directory handling that allows an attacker who can manipulate destination path parent components to redirect file writes to unintended locations. Attackers can substitute a symlink for a component of the destination path between the path resolution and chdir() call, causing the receiver's working directory to be established outside the intended destination tree so that subsequent relative-path file writes land in unintended filesystem locations.

Score

CVSS 3.1 6.3 Medium

Status

Awaiting Analysis - disclosure@vulncheck.com

Published

2026-08-13

Last modified

2026-10-24

Weaknesses

CWE-367, CWE-59

Affected products

• Rsync (Samba)

References

• https://github.com/RsyncProject/rsync/security/advisories/GHSA-w75h-ccff-w53m
• https://github.com/RsyncProject/rsync/releases/tag/v3.5.0
• https://www.vulncheck.com/advisories/rsync-toctou-race-condition-via-destination-directory-handling